The top-level design of micro turbine jet-engine is presented in the paper.Firstly

the relationship between dimensions and performance of micro turbine engine is analysed.Results show that micro turbine engines have potential larger ratio of thrust to weight than conventional engines.A preliminary design of a micro turbine engine is illustrated on the basis of the related technologies that can be achieved recently.Parametric analysis of performance

such as:thrust

specific fuel consumption

energy efficiency

exhaust gas temperature

was performed by changing one or two of 7 variables.In order to assess if the design of the micro turbine engine is capable of generating the reguired thrust when put into practice

a convenient criterion is formulated

and three designs of micro turbine engine are obtained for high

moderate and low performance.